WO2016132712A1 - Antenne multibande, réseau d'antennes multibandes, et dispositif de communications sans fil - Google Patents

Antenne multibande, réseau d'antennes multibandes, et dispositif de communications sans fil Download PDF

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Publication number
WO2016132712A1
WO2016132712A1 PCT/JP2016/000694 JP2016000694W WO2016132712A1 WO 2016132712 A1 WO2016132712 A1 WO 2016132712A1 JP 2016000694 W JP2016000694 W JP 2016000694W WO 2016132712 A1 WO2016132712 A1 WO 2016132712A1
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WIPO (PCT)
Prior art keywords
conductor
antenna
antenna elements
reflector
shaped
Prior art date
Application number
PCT/JP2016/000694
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English (en)
Japanese (ja)
Inventor
圭史 小坂
博 鳥屋尾
Original Assignee
日本電気株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 日本電気株式会社 filed Critical 日本電気株式会社
Priority to JP2017500502A priority Critical patent/JP6610652B2/ja
Priority to US15/544,699 priority patent/US10340609B2/en
Publication of WO2016132712A1 publication Critical patent/WO2016132712A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/10—Resonant slot antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/14—Reflecting surfaces; Equivalent structures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/061—Two dimensional planar arrays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
    • H01Q21/26—Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • H01Q25/001—Crossed polarisation dual antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
    • H01Q5/42—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements using two or more imbricated arrays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/10—Resonant slot antennas
    • H01Q13/18—Resonant slot antennas the slot being backed by, or formed in boundary wall of, a resonant cavity ; Open cavity antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H01Q5/364—Creating multiple current paths
    • H01Q5/371—Branching current paths

Definitions

  • the present invention relates to an antenna, an antenna array, and a wireless communication device, and more particularly to a multiband antenna, a multiband antenna array, and a wireless communication device.
  • a multiband antenna that can communicate in a plurality of frequency bands has been put into practical use to secure communication capacity. It is provided.
  • the multiband antenna is, for example, FIG. 11, FIG. 12, FIG. 13 discloses a multiband antenna array.
  • This antenna array is an array in which high-band and low-band crossed-dipole antenna elements are alternately arranged on an antenna reflector.
  • central conductive fences 1340 are provided between the arrays to reduce mutual coupling.
  • a decoupling element structural element 17
  • antenna elements radiation element element module 1
  • An object of the present invention has been made to solve such a problem, and is to provide a multiband antenna, an antenna array, and a wireless communication apparatus capable of realizing miniaturization.
  • An antenna according to the present invention includes a first antenna including a first antenna element having a resonance frequency in a first frequency band; A second antenna comprising a second antenna element having a resonant frequency in a second frequency band that is a higher frequency band than the first frequency band; A conductor reflector; Have The first and second antenna elements face a C-shaped conductor, which is a substantially C-shaped conductor in which a split portion is formed so that a part of the annular conductor is discontinuous, via the split portion. A conductor feed line that is electrically connected to one of the two parts of the C-shaped conductor and constitutes an electric path for feeding power to the C-shaped conductor.
  • the present invention it is possible to provide a multiband antenna, a multiband antenna array, and a wireless communication device that can be miniaturized.
  • 1 is a perspective view of an antenna according to a first embodiment of the present invention. It is a front view of the antenna which concerns on the 1st Embodiment of this invention. It is a radio
  • FIG. 1 is a perspective view of the antenna 10 and FIG. 2 is a side view of the antenna 10.
  • an x-axis and a y-axis are defined on a plane formed by a conductor reflector 101 described later, and a z-axis is defined in a direction perpendicular to the plane formed by the conductor reflector 101.
  • the x, y, and z axes shown in other figures described later are also defined in the same manner.
  • the antenna 10 includes an antenna element 100 as a first antenna element, an antenna element 200 as a second antenna element, and a conductor reflector 101.
  • the first antenna element has a resonance frequency in the first frequency band
  • the second antenna element has a resonance frequency in the second frequency band, which is a higher frequency than the first frequency band.
  • the antenna element 100 is provided at a distance of z1 above the conductor reflector 101.
  • the antenna element 200 is provided at a distance z2 above the conductor reflector 101.
  • the antenna elements 100 and 200 include, for example, a C-shaped conductor 104, a conductor feed line 105, a conductor via 106, a feed point 107, and a dielectric layer 108.
  • the dielectric layer 108 is not shown in FIG. 1 in order to facilitate understanding of the arrangement of other configurations. Also, in the drawings described later, the dielectric layer 108 is omitted as appropriate.
  • the C-shaped conductor 104 is a conductor that functions as a split ring resonator, and is a substantially C-shaped conductor in which the split portion 109 is formed so that a part of the annular conductor is discontinuous.
  • the antenna elements 100 and 200 are provided perpendicular to the conductor reflector 101, that is, parallel to the xz plane.
  • the outer shape of the C-shaped conductor 104 is a substantially rectangular shape, and a split portion 109 is formed on the long side thereof.
  • the split part 109 is a part from which the annular conductor is cut off.
  • the split part 109 is a gap formed so that one end and the other end of the C-shaped conductor 104 face each other.
  • the length of the C-shaped conductor 104 in the longitudinal direction is, for example, about 1/4 of ⁇ 1 for the antenna element 100 and about 1/4 of ⁇ 2.
  • ⁇ 1 and ⁇ 2 indicate wavelengths when an electromagnetic wave whose frequency is the resonance frequency of the first antenna element or the second antenna element travels in a substance that fills the region.
  • the conductor feeding line 105 is a conductor that feeds power from the feeding point 107 to the C-shaped conductor 104. Therefore, the conductor power supply line 105 constitutes an electric circuit for supplying power to the C-shaped conductor 104.
  • the conductor feeder 105 is, for example, a conductor having a length approximately equal to the length of the C-shaped conductor 104 in the z-axis direction.
  • the dielectric layer 108 is a plate-like dielectric.
  • the dielectric layer 108 is, for example, a dielectric layer that constitutes a substrate.
  • the dielectric layer 108 is a layer between the layer where the C-shaped conductor 104 exists and the layer where the conductor feed line 105 exists.
  • the C-shaped conductor 104 is provided on one surface side of the dielectric layer 108.
  • the conductor feed line 105 is provided on the other surface side of the dielectric layer 108, and faces the C-shaped conductor 104 with a gap therebetween via the dielectric layer 108.
  • the conductor via 106 is a via that electrically connects one conductor portion of both the conductor portions 110 and 111 of the C-shaped conductor 104 facing in the circumferential direction via the split portion 109 and one end of the conductor feed line 105. is there. In the example shown in FIGS. 1 and 2, it is a via that electrically connects the conductor portion 110 and one end of the conductor feed line 105.
  • the feeding point 107 is a point to which high frequency power from a power supply (not shown) is supplied. More specifically, the feed point 107 is electrically connected between the other end of the conductor feed line 105 (the side not connected to the conductor via 106) and the portion of the C-shaped conductor 104 near the other end. This is a feed point that can be excited. In the example shown in FIGS. 1 and 2, the feeding point 107 is electrically connected between the portion of the C-shaped conductor 104 at a position facing the conductor portion 110 in the z-axis direction and the other end of the conductor feeding line 105. Can be excited.
  • the antenna elements 100 and 200 are formed in a C-shape facing the conductor portion 110 or the conductor portion 111 of the C-shaped conductor 104 and the conductor portion 110 or 111 in the inner direction of the C-shaped conductor 104 with a gap.
  • High frequency power is supplied to a conductor portion on the conductor 104.
  • the feeding point 107 is connected to, for example, a wireless communication circuit (not shown) or a transmission line that transmits a wireless signal from the wireless communication circuit, and a wireless communication signal is transmitted between the wireless communication circuit and the antenna 10 via the feeding point 107. Can communicate.
  • the antenna elements 100 and 200 and the conductor reflector 101 are arranged apart from each other in the z-axis direction by a predetermined interval (distances Z1 and Z2 shown in FIG. 2).
  • the conductor reflector 101 is a short-circuited surface, the distance Z1 is approximately 1 ⁇ 4 of ⁇ 1 and the distance Z2 is approximately 1 ⁇ 4 of ⁇ 2 in order to suppress the influence on the resonance characteristics of the antenna element. It is more desirable.
  • the conductor reflector 101, the C-shaped conductor 104, the conductor feeder 105, the conductor via 106, and what is described as a conductor in the following description are, for example, metals such as copper, silver, aluminum, nickel, etc. It is composed of a good conductor material.
  • the conductor reflecting plate 101 is formed on a ceramic substrate such as a glass epoxy substrate or an alumina substrate.
  • the C-shaped conductor 104, the conductor feed line 105, the conductor via 106, and the dielectric layer 108 are generally manufactured by a normal substrate manufacturing process such as a printed circuit board or a semiconductor substrate, but are manufactured by other methods. May be.
  • the conductor via 106 is generally formed by plating a through hole formed in the dielectric layer 108 with a drill, but any conductor can be used as long as the layers can be electrically connected.
  • the dielectric layer 108 may be omitted.
  • the dielectric layer 108 may be composed of only a partial dielectric support member, and at least a part of the dielectric layer 108 may be hollow.
  • the conductor reflector 101 is generally formed of sheet metal or copper foil bonded to a dielectric substrate, but may be formed of other materials as long as it is conductive.
  • the C-shaped conductor 104 is an LC series in which an inductance caused by a current flowing along the ring and a capacitance generated between opposing conductors in the split portion 109 are connected in series. Functions as a resonator. That is, the C-shaped conductor 104 functions as a split ring resonator. In the vicinity of the resonance frequency of the split ring resonator, a large current flows through the C-shaped conductor 104, and a part of the current component contributes to the radiation to operate as an antenna.
  • the current component in the longitudinal direction (x-axis direction in FIGS. 1 and 2) of the antenna elements 100 and 200 mainly contributes to radiation. For this reason, it is possible to realize good radiation efficiency by increasing the length of the C-shaped conductor 104 in the longitudinal direction.
  • the length of the C-shaped conductor 104 in the longitudinal direction (x-axis direction in FIGS. 1 and 2) is, for example, about 1/4 of ⁇ 1 for the antenna element 100 and about 1/4 of ⁇ 2 for the antenna element 200. is there. Therefore, the antenna elements 100 and 200 are smaller than the dipole antenna element corresponding to each frequency.
  • the multiband antenna can be reduced in size by using the antenna elements 100 and 200 corresponding to each frequency as compared with the case of using a plurality of dipole antennas.
  • the antenna elements 100 and 200 are reduced in size, the antenna elements 100 and 200 can be kept closer to each other.
  • the C-shaped conductor 104 of the antenna element 100 shown in FIGS. 1 and 2 is substantially rectangular, even if the antenna element 100 has other shapes, the essential effect of the present invention is not affected.
  • the antenna element 100 may have a square shape, a circular shape, a triangular shape, a bowtie shape, or the like.
  • the resonance frequency of the split ring resonator described above is such that the distance between the opposing conductors in the split portion 109 is narrowed, or the size of the split ring (C-shaped conductor 104) is increased to increase the current path.
  • the frequency can be lowered.
  • the frequency can also be lowered by increasing the capacitance by narrowing the interval between the opposing conductors in the split portion 109.
  • the method of narrowing the distance between the opposing conductors at the split portion 109 is suitable for downsizing because the operating frequency can be lowered without increasing the overall size.
  • the antenna 10 of this embodiment may be appropriately incorporated as a wireless communication device such as Wi-Fi or an antenna unit in a mobile communication base station.
  • FIG. 3 illustrates a wireless communication device 11 that is an example of a wireless communication device including the antenna 10.
  • 3 includes an antenna 10, a dielectric radome 112 that mechanically protects the antenna 10, a wireless communication circuit unit 114, the antenna element 100 or 200 in the antenna 10, and the wireless communication circuit unit 114.
  • the dielectric radome 112 is illustrated as being transparent for simplification of illustration. With such a configuration, a wireless communication device using a multiband antenna can be reduced in size while maintaining radiation efficiency.
  • the wireless communication device 11 may be used as a wireless communication device, a mobile communication base station, or a radar, for example.
  • the wireless communication apparatus 11 may include a baseband processing unit 170 that performs baseband processing, as shown in FIG.
  • the antenna 10 of FIGS. 1 and 2 includes a conductor reflector 101.
  • the conductor reflector 101 is above the antenna elements 100 and 200 when viewed from the conductor reflector 101 (in the positive z-axis direction in FIGS. 1 and 2).
  • the main purpose is to increase the radiation intensity of electromagnetic waves. Therefore, the antenna 10 functions as a small multiband antenna without the conductor reflector 101.
  • the antenna 10 in FIGS. 1 and 2 is a dual-band antenna in which the antenna elements 100 and 200 correspond to two frequencies, respectively. However, it may be a multiband antenna that includes a plurality of antenna elements each having a resonance frequency in each frequency band and is compatible with three or more frequency bands.
  • the antenna elements 100 and 200 are arranged substantially in parallel, but are not necessarily placed in parallel, and the antenna element 200 is located immediately below the antenna element 100. It doesn't matter.
  • the antenna elements 100 and 200 were arrange
  • the antenna elements 100 and 200 may be arranged in a posture parallel to the conductor reflector 101 (parallel to the xy plane).
  • the dielectric layer 108 is not shown for the sake of simplicity of explanation. In this case, the antenna elements 100 and 200 may be formed on each layer of the same substrate to form an integrated substrate.
  • the antenna elements 100 and 200 are not arranged on the same plane. However, as shown in FIG. 6, the antenna element 100 and the antenna element 200 are arranged on the same plane, and at that time, the dielectric layer 108 is shared by the antenna elements 100 and 200 and the same layer or each layer in the same substrate. In addition, the antenna elements 100 and 200 may be created.
  • the antenna element 100 and the antenna element 200 do not necessarily have the structure shown in FIGS. 1 and 2, and further structural improvements may be made.
  • 7 to 11 are diagrams showing various modifications of the configuration of the antenna element 100.
  • the dielectric layer 108 may be made larger in size than the C-shaped conductor 104.
  • the dimensional accuracy of the C-shaped conductor 104 is increased by cutting the end of the dielectric layer 108 as the dielectric layer 108 is formed. Deterioration can be prevented.
  • one end of the conductor feed line 105 is directly electrically connected to and connected to a portion (conductor portion 110 or 111) on the long side of the C-shaped conductor 104 on the side far from the conductor reflector 101, and a conductor via. 106 may be omitted.
  • the conductor power supply line 105 may be a linear conductor such as a copper wire.
  • the antenna elements 100 and 200 may be configured using a plurality of conductor feed lines.
  • conductor feed lines 151 and 152 and a conductor via 153 may be provided.
  • the conductor feed line 151 is in the same layer as the C-shaped conductor 104, and the conductor feed line 152 is in a different layer from the C-shaped conductor 104.
  • one end of the conductor feed line 151 is electrically connected to the conductor portion 110 or 111 of the C-shaped conductor 104.
  • one end of the conductor feed line 152 is electrically connected to the feed point 107.
  • a broken line extending from the feeding point 107 indicates an electrical path to the conductor feeding line and the C-shaped conductor.
  • the antenna element 100 may include a bridging conductor 116 that conducts the notched portion of the split ring resonator without contacting the conductor feed line 105.
  • antenna elements 100 and 200 may be further devised for improving electrical characteristics.
  • the antenna elements 100 and 200 may include conductive conductor radiating portions 117 at both ends in the longitudinal direction of the C-shaped conductor 104. That is, the conductor radiating portion 117 is electrically connected to the outer edges located at both ends of the C-shaped conductor 104 in the direction in which both the conductor portions 110 and 111 face each other.
  • the conductor radiating portion 117 is a conductor and may be the same material as the C-shaped conductor 104.
  • the current component in the longitudinal direction of the C-shaped conductor 104 that contributes to radiation can be guided to the conductor radiation portion 117, so that radiation efficiency can be improved.
  • the conductor radiating portion 117 may be provided only at one end of the C-shaped conductor 104.
  • the shape of the conductor radiating portion 117 is not limited to the shape shown in FIG.
  • FIG. 12 shows a shape in which the sides of the portion where the conductor radiating portion 117 and the C-shaped conductor 104 are connected match each other, but the shape of the conductor radiating portion 117 is not limited to this. Absent.
  • the size of each side of the portion where the conductor radiating portion 117 and the C-shaped conductor 104 are connected may not be the same.
  • the side of the conductor radiating portion 117 may be larger than the side of the C-shaped conductor 104.
  • the conductor portions in the longitudinal direction of the antenna elements 100 and 200 are extended by the C-shaped conductor 104 and the conductor radiating portion 117, thereby realizing better radiation efficiency.
  • the longitudinal direction of the C-shaped conductor 104 may not coincide with the longitudinal direction of the antenna elements 100 and 200.
  • the shape of the C-shaped conductor 104 may be a rectangle having a long side in the z-axis direction.
  • the conductor radiating portion 117 is not limited to a rectangle, and may be a square, a circle, a triangle, or the like.
  • the resonance frequency of the split ring resonator is such that the inductance of the split ring ring is increased to increase the inductance by increasing the current path or the distance between the conductors facing each other at the split portion 109.
  • the frequency can be lowered by increasing the capacitance by narrowing.
  • the area of the C-shaped conductor 104 facing the split portion 109 may be increased.
  • both ends of the C-shaped conductor 104 facing each other via the split portion 109 are refracted in a direction substantially orthogonal to the facing direction, so that the C facing the split portion 109 is opposed.
  • the area of the letter-shaped conductor 104 is increased.
  • the two auxiliary conductor patterns 118 are similarly refracted so as to face the refracted ends of the C-shaped conductor 104. Yes.
  • the opposing conductor area may be increased in the split portion 109 in the split ring resonator.
  • the two auxiliary conductor patterns 118 are arranged in the same layer as the conductor feeder 105.
  • the two auxiliary conductor patterns 118 are arranged in different layers from the C-shaped conductor 104 and the conductor feed line 105.
  • the antenna elements 100 and 200 are electrically connected to one part of both parts of the C-shaped conductor 104 facing each other through the split part 109, and are auxiliary parts facing the other part.
  • At least one conductor pattern 118 may be provided.
  • the auxiliary conductor pattern 118 is electrically connected to the C-shaped conductor 104 by the conductor via 119.
  • the auxiliary conductor pattern 118 is provided for each of the two conductor portions opposed via the split portion 109.
  • the auxiliary conductor pattern 118 is provided. Is provided only for one conductor portion.
  • the auxiliary conductor pattern 118 and at least a part of the other conductor portion are opposed to each other between the layer of the C-shaped conductor 104 and the layer of the auxiliary conductor pattern 118, so that the conductor facing the split portion 109 is opposed.
  • the area is increased.
  • the auxiliary conductor pattern 118 and the conductor feed line 105 are arranged in the same layer, but they may be arranged in different layers.
  • both end portions of the C-shaped conductor 104 and the auxiliary conductor pattern 118 have a refracted shape, but may have a shape that is not refracted or may have a different shape. It may be.
  • the split ring resonance viewed from the feed point 107 is obtained.
  • the input impedance of the device can be changed.
  • the antenna elements 100 and 200 may be configured by overlappingly providing a C-shaped conductor 120 having the same configuration as the C-shaped conductor 104.
  • the C-shaped conductor 120 which is the second C-shaped conductor is provided in a layer different from the C-shaped conductor 104 and the conductor feed line 105.
  • the layer of the conductor feed line 105 is sandwiched between the layer of the C-shaped conductor 104 and the layer of the C-shaped conductor 120.
  • the C-shaped conductor 104 and the C-shaped conductor 120 are electrically connected to each other through a plurality of conductor vias 121.
  • the C-shaped conductor 104 and the C-shaped conductor 120 operate as one split ring resonator.
  • the conductor feed line 105 is surrounded by many portions around the C-shaped conductors 104 and 120 that are conductive with each other and the plurality of conductor vias 121. Thereby, it is possible to reduce unnecessary signal electromagnetic wave radiation from the conductor power supply line 105.
  • an auxiliary conductor pattern 118 may be provided as in FIG. Specifically, in the example shown in FIG. 21, a layer different from the C-shaped conductor 104 and the C-shaped conductor 120 (a layer sandwiched between the layer of the C-shaped conductor 104 and the layer of the C-shaped conductor 120). Auxiliary conductor pattern 118 is provided. Further, the auxiliary conductor pattern 118 is electrically connected to the conductor portion near the split portion 109 in the C-shaped conductor 104 and the conductor portion near the split portion 122 in the C-shaped conductor 120 by the conductor via 119.
  • antenna elements 100 and 200 include conductor portions 130 and 131 connected via a plurality of conductor vias 121. These conductor portions 130 and 131 form one C-shaped conductor with two layers. That is, the conductor part 130 has a structure in which the long side part facing the split part 109 across the gap is removed from the second C-shaped conductor part 120 in FIG.
  • the conductor part 131 has a structure in which the long side part including the split part 109 is removed from the C-shaped conductor part 104 in FIG.
  • the configuration shown in FIG. 23 may be adopted.
  • the configuration shown in FIG. 23 further includes a conductor portion 132 having the same shape as the conductor portion 131 in addition to the configuration shown in FIG.
  • the conductor part 132 is provided on the side opposite to the conductor part 131 when viewed from the conductor part 130.
  • the conductor part 132 is connected to the conductor part 130 by a plurality of conductor vias 121 in the same manner as the conductor part 131.
  • the split portion 109 can be formed in the inner layer of the dielectric layer 108. Therefore, the influence of the object outside the dielectric layer 108 on the magnitude of the capacitance generated by the split portion 109 can be reduced.
  • the conductor feed line 105 is directly connected to one end of the refracted and extended conductor pattern that is opposed to the split part 109.
  • a metamaterial reflector Metalref may be used as the conductor reflector 101.
  • the metamaterial reflector Metalref (also referred to as an artificial magnetic conductor, a high impedance surface, or the like) is a periodic structure UC formed of a conductor piece or a dielectric piece formed in a predetermined shape. As shown in FIG. 24, the reflecting plate is periodically arranged in the vertical direction (Y′-axis direction) and the horizontal direction (X′-axis direction). By doing in this way, the phase rotation by reflection of the electromagnetic wave which reflects the metamaterial reflecting plate Metaref can be made into the value different from the reflection phase 180 degrees by a normal metal plate.
  • FIG. 25 is a perspective view of the antenna 20, and FIG. 26 is a side view of the antenna 20.
  • the dielectric layer 108 the dielectric layer 108 of the antenna elements 100 and 200 is not shown in FIG. 25 in order to facilitate understanding of the arrangement of other configurations.
  • the antenna 20 is different from the antenna 10 of the first embodiment in that it further includes a conductor feeding portion 123.
  • One end of the conductor feeding portion 123 is connected to the outer edge portion of the C-shaped conductor 104, and the other end is connected to the conductor reflector 101.
  • the antenna 20 is provided with a conductor feeding portion 123 for each of the antenna elements 100 and 200 constituting the antenna 20.
  • the conductor power supply unit 123 is a conductor that forms an electric circuit for supplying power to the C-shaped conductor 104.
  • One end of the conductor feeding portion 123 is connected to the vicinity of the position facing the split portion 109 in the outer edge portion of the C-shaped conductor 104, and the other end is connected to the conductor reflector 101.
  • the conductor feeding portion 123 is located at or near the central portion of the C-shaped conductor 104 (the central portion of the C-shaped conductor 104 in the x-axis direction) in the outer edge portion of the C-shaped conductor 104. It connects with the part to do. As described above, the C-shaped conductor 104 and the conductor feeding portion 123 are connected to each other at a position within a predetermined range from the center of the C-shaped conductor 104. As shown in FIG. 26, the length of the conductor feeding portion 123 is Z1 in the antenna element 100 and Z2 shorter in the antenna element 200.
  • the conductor feed line 105 is extended toward the conductor reflector 101 side.
  • the dielectric layer 108 is also extended toward the conductor reflector 101.
  • the conductor power supply unit 123 is arranged side by side with the extended conductor power supply line 105. More specifically, the conductor power supply portion 123 is arranged side by side so as to face the conductor power supply line 105.
  • the antenna element 100 is fixed to the conductor reflecting plate 101 by the conductor feeding portion 123.
  • the feeding point 107 in the antenna 20 is disposed in the vicinity of one end portion of the conductor feeding line 105 on the extended side (that is, the conductor reflecting plate 101 side).
  • the feeding point 107 can be electrically excited between one end portion of the conductor feeding line 105 on the extended side and the conductor feeding unit 123 near the position where the feeding point 107 is disposed.
  • a power supply including an oscillator, an amplifier, and the like may be configured on the back side of the conductor reflector 101, that is, the side opposite to the side where the antenna 20 is present. In this case, power is supplied to the feeding point 107 from the power supply on the back side of the conductor reflector 101.
  • the antenna 20 is different from the antenna 10 according to the first embodiment in the points described above, the other configurations are the same as those of the antenna 10.
  • the conductor electric power feeding part 123 is connected with the conductor reflecting plate 101 in the example shown in FIG. 25, FIG. 26, it does not necessarily need to be connected.
  • the conductor When connecting a transmission line that transmits a radio signal to the antenna element via a feeding point, the conductor is connected to the resonator. Therefore, the resonance of the antenna element depends on the arrangement and shape of the transmission line near the antenna element. The characteristics may change.
  • the portion where the conductor feeding portion 123 is connected to the antenna element 100 or 200 is located at a substantially central portion of the antenna element 100 or 200.
  • the vicinity of both ends in the longitudinal direction (x-axis direction in FIGS. 1 and 2) is an electrically open surface, and the electric field strength is high and the magnetic field strength is weak.
  • the vicinity of the substantially central portion in the longitudinal direction of the antenna elements 100 and 200 is an electrically shorted surface, and the magnetic field strength is strong and the electric field strength is weak. Therefore, the position where the conductor feeding portion 123 is connected to the antenna element 100 or 200 is a portion where the electric field strength is weak due to an electrical short circuit during resonance.
  • the conductor power supply unit 123 when the conductor power supply unit 123 is connected as described above, the conductor power supply unit 123 does not increase extra capacitance or inductance that affects the resonance characteristics. As a result, the resonance characteristics of the antenna elements 100 and 200 hardly change.
  • the inventors have found the above.
  • the extended conductor feed line 105 and the conductor feed part 123 arranged alongside this form a transmission line connected to the antenna element. And according to this transmission line, the influence on a resonance characteristic can be suppressed. Further, by providing the feeding point 107 on the side far from the antenna elements 100 and 200 in this transmission line, the distance between the transmission line connected ahead of the feeding point 107 and the antenna element 100 can be increased. As a result, the influence of the transmission line on the antenna elements 100 and 200 can be reduced.
  • the conductor feeding portion 123 is preferably connected to the outer edge portion of the antenna element 100 or 200 corresponding to the substantially central portion of the antenna element 100 or 200 that is an electrical short-circuit surface at the time of resonance. More specifically, the plane including the central portion of the antenna element 100 or 200 and perpendicular to the longitudinal direction of the antenna element 100 or 200 (the x-axis direction in FIGS. 1 and 2) is electrically It becomes a short circuit surface. That is, for example, in FIGS. 25 and 26, the yz plane including the central portion of the antenna element 100 or 200 is an electrical short-circuit surface at the time of resonance.
  • the size of the antenna element 100 or 200 in the lengthwise direction (x-axis direction in the figure) of the antenna element 100 or 200 is provided from the electrical short-circuit plane (as a modification, the conductor radiating portion 117 is provided) If it is within a range of 1/4 of the size including this, it can be regarded as a short-circuit plane.
  • the conductor feeding portion 123 is within this range, that is, the size of the antenna element 100 or 200 in the longitudinal direction centered on the center of the antenna element 100 (the size including the conductor radiating portion 117 as a modification). ) Is preferably within the range of 1/2. Therefore, it is preferable that the size of the conductor feeding portion 123 viewed in the longitudinal direction of the antenna element 100 or 200 is 1 ⁇ 2 or less of the size of the antenna element 100 or 200 in the longitudinal direction.
  • the conductor feeding portion 123 is located in a range other than the above, the essential effect of the present invention is not affected. Further, even if the size of the conductor feeding portion 123 as viewed in the longitudinal direction of the antenna element 100 or 200 is other than the above, the essential effect of the present invention is not affected.
  • a multiband antenna in which the influence of the transmission line on the resonance characteristics of the antenna element is suppressed.
  • a wireless communication device is configured using the antenna 20
  • a wireless communication device in which the influence of the transmission line on the resonance characteristics of the antenna element can be suppressed can be provided.
  • the antenna 20 may be configured as follows.
  • the antenna elements 100 and 200 and the conductor reflection plate 101 are formed on different layers in the same substrate.
  • the conductor via in the substrate is extended to connect to the conductor reflector 101, and for the conductor feeder 105, the other conductor via in the substrate is extended to reflect the conductor. Connect to the board.
  • the entire antenna 20 may be formed as an integrated substrate.
  • the respective conductor feeding portions 123 may be similarly configured in the same substrate.
  • the conductor feeding portion 123 has one end connected to the vicinity of the end portion of the C-shaped conductor 104 facing the split portion 109.
  • the connection location may be changed as appropriate within the allowable range of the influence of the conductor feeding portion 123 on the resonance characteristics of the antenna elements 100 and 200.
  • the conductor feeding portion 123 may be connected to the C-shaped conductor 104 over a portion of the C-shaped conductor 104 other than the vicinity of the end facing the split portion 109. Absent.
  • the antenna element 200 may be positioned immediately below the antenna element 100 in the z-axis direction. At this time, the conductor feeding portion 123 belonging to the antenna element 100 is deformed, and the antenna A structure that avoids the element 200 may be used.
  • the conductor feeding portions 123 of the antenna elements 100 and 200 are separated from each other, but they are connected within the allowable range of the influence of the conductor feeding portion 123 on the resonance characteristics of the antenna elements 100 and 200. It does not matter.
  • the dielectric layer 108 is not shown in order to facilitate understanding of the arrangement of other configurations. Similarly, in FIGS. 28 to 31, which will be described later, the dielectric layer 108 is not shown.
  • the input impedance to the antenna viewed from the feeding point 107 is the conductor via 106 (one end of the conductor feeding line 105 when the conductor via 106 is omitted).
  • the conductor via 106 one end of the conductor feeding line 105 when the conductor via 106 is omitted.
  • the antenna 20 it also depends on the characteristic impedance of the transmission line constituted by the extended conductor feed line 105 and the conductor feed part 123.
  • the characteristic impedance of the transmission line described above with the input impedance of the split ring resonator it is possible to feed the wireless communication signal to the antenna without reflection between the transmission line and the split ring resonator. It becomes.
  • the impedance is not matched, the essential effect of the present invention is not affected.
  • a transmission line constituted by the extended conductor feed line 105 and the conductor feed part 123 may be a coplanar line.
  • the C-shaped conductor 104, the conductor feed line 105, and the conductor feed portion 123 are formed in the same layer.
  • the C-shaped conductor 104 is closer to the conductor reflector 101 in the C-shaped conductor 104 (split portion 109). A part on the long side of the side opposite to is cut out. Then, the conductor feed line 105 passes through the notched portion, so that the conductor feed line 105 extends to the conductor reflector 101 side.
  • the conductor feeding portion 123 is connected to the C-shaped conductors 104 on both sides of the notched portion. Further, the conductor feeding portion 123 has a slit 165 formed at a position corresponding to the notched portion in order to place the extending conductor feeding line 105, and has a long and narrow U shape.
  • the transmission line constituted by the conductor feed line 105 and the conductor feed part 123 can be a coplanar line. it can.
  • the antenna 20 has a configuration similar to that of the C-shaped conductor 104 in addition to the C-shaped conductor 104 as shown in FIG. 20 or FIG. 21 referred to in the description of the first embodiment.
  • the character-shaped conductor 120 may be provided in an overlapping manner.
  • a C-shaped conductor 120 which is a second C-shaped conductor, is provided in a layer different from the C-shaped conductor 104 and the conductor feeder 105.
  • the conductor feeding portion 123 is coupled to the C-shaped conductor 120, and the conductor feeding portion 124 of the same layer as the C-shaped conductor 120 is coupled.
  • the antenna 20 is configured such that the layer of the conductor feed line 105 is sandwiched between the layer of the C-shaped conductor 104 and the conductor feeding portion 123 and the layer of the C-shaped conductor 120 and the conductor feeding portion 124.
  • the conductor feed line 105 faces the conductor feed unit 123 and the conductor feed unit 124.
  • the C-shaped conductor 104 and the C-shaped conductor 120 are electrically connected to each other by a plurality of conductor vias 121.
  • the conductor feeding portion 123 and the conductor feeding portion 124 are electrically connected to each other by a plurality of conductor vias 125.
  • the conductor feed line 105 includes a C-shaped conductor 104 and a C-shaped conductor 120 which are conductive conductors, a plurality of conductor vias 121, a conductor feed portion 123 and a conductor feed portion 124, and a plurality of conductor vias. 125 surrounds many of the surrounding areas. Thereby, it is possible to reduce unnecessary signal electromagnetic wave radiation from the conductor power supply line 105.
  • conductor feeders 123 and 124 and a conductor via 125 may be added to the configuration of FIG. 23 described in the first embodiment. With this configuration, the split portion 109 can be formed in the inner layer of the dielectric layer 108 as in the configuration of FIG.
  • FIG. 31 is a diagram illustrating an example of the antenna 20 when the transmission line is a coaxial line.
  • the dielectric layer 108 is not shown for understanding other configurations.
  • the antenna element 100 has the same conductor feed line 154 as that of the first embodiment.
  • a coaxial cable 160 is connected to the antenna element 100.
  • the coaxial cable 160 is composed of a core wire 161 and an outer conductor 162.
  • the core wire 161 is connected to the conductor feed line 154
  • the outer conductor 162 is connected to the lower end of the C-shaped conductor 104.
  • the feeding point 107 is provided so as to electrically excite between the core wire 161 and the outer conductor 162.
  • the core wire 161 and the conductor feed line 154 correspond to the conductor feed line 105
  • the outer conductor 162 corresponds to the conductor feed portion 123.
  • the coaxial cable may be provided on the back side (z-axis negative direction side) of the conductor reflector 101.
  • 32 and 33 are diagrams illustrating an example of the antenna 20 in the case where the coaxial cable is provided on the back side of the conductor reflector 101.
  • the dielectric layer 108 is not shown in FIGS.
  • the conductor reflector plate 101 is provided with a clearance 126 which is a through hole.
  • a connector 127 is provided at a position on the back side (z-axis negative direction side) of the conductor reflecting plate 101 corresponding to the clearance position.
  • the connector 127 is a connector for connecting a coaxial cable (not shown).
  • the outer conductor 129 of the connector 127 is electrically connected to the conductor reflector 101.
  • the core wire 128 of the connector 127 passes through the inside of the clearance 126 and penetrates to the front side (z-axis positive direction side) of the conductor reflector 101 and is electrically connected to the conductor feed line 105 of the antenna element 100. Further, the feeding point 107 can be electrically excited between the core wire 128 of the connector 127 and the external conductor 129.
  • the coaxial cable is provided on the back side of the conductor reflector 101.
  • the conductor constituting the transmission line may be provided on the back side of the conductor reflector 101. It does not have to be a coaxial cable.
  • the conductor reflector 101 is a short-circuited surface with respect to the antenna elements 100 and 200. Therefore, in order to suppress the influence on the resonance characteristics of the antenna elements, the distances Z1 and Z2 between the antenna elements 100 and 200 and the conductor reflector 101 in FIG. 26 are electromagnetic waves whose frequencies are the resonance frequencies of the respective antenna elements. Is more preferably about one quarter of the wavelength when traveling through the material filling the region. However, even when the wavelength is not about one-fourth, the essential effect of the present invention is not affected.
  • FIG. 34 is a diagram showing the structure of antenna elements 100 and 200 according to a modification of the second embodiment. As shown in FIG.
  • a metamaterial reflector Metalref may be used as the conductor reflector 101 as in FIG.
  • the conductor pieces constituting the periodic structures UC located immediately below the antenna elements 100 and 200 are removed, and only the conductor plate M101 is removed. May be present. By doing so, it is possible to prevent the conductor feeder 105 and the conductor feeder 123 from overlapping the periodic structure UC.
  • FIG. 35 is a perspective view of the antenna 30
  • FIG. 36 is a side view of the antenna 30
  • FIG. 37 is a top view of the antenna 30.
  • the dielectric layer 108 the dielectric layer 108 of the antenna elements 100 and 200 is not shown in FIGS. 35 and 36 in order to facilitate understanding of the arrangement of other configurations.
  • the antenna 30 is different from the antenna 10 in that it includes two antenna elements 100 and 200 each.
  • the two antenna elements 100 and 200 are in a projection view onto the conductor reflector 101 and the longitudinal directions of the elements are substantially perpendicular to each other, and the longitudinal ends of one of the antenna elements 301 is located in the vicinity of the split portion 109, which is the substantially central portion of the other antenna element.
  • the extension line in the longitudinal direction of one element is arranged so as to intersect the other element at a substantially central portion of the other element.
  • the antenna 30 includes the two antenna elements 100 and the two antenna elements 200 that are in a substantially vertical relationship, it is possible to provide an antenna that supports multiband and orthogonal dual polarization.
  • the longitudinal direction end portion 301 of one antenna element is located in the vicinity of the split portion 109, which is a substantially central portion of the other antenna element. Thus, it is preferable to arrange them substantially vertically.
  • the portions having high strength can be arranged orthogonally so as not to be close to each other.
  • the two antenna elements can be arranged close to each other while suppressing electromagnetic coupling. That is, when each of the antenna elements 100 and 200 is dual polarized, the electromagnetic coupling between the polarized waves can be suppressed, and the elements of each polarized wave can be placed close to each other, resulting in dual polarization. The accompanying increase in the size of the entire antenna can be suppressed.
  • a multiband antenna that supports orthogonal dual polarization and suppresses an increase in the overall size of the antenna due to dual polarization while suppressing coupling between polarizations. Can be provided.
  • a wireless communication device is configured using this antenna 30, a wireless communication device compatible with two polarizations can be provided.
  • the two antenna elements 100 and the two antenna elements 200 may include the conductor feeding portion 123 described in the second embodiment.
  • various modifications of the third embodiment will be described below. In addition, you may combine suitably about the various modification demonstrated below.
  • the two adjacent antenna elements 100 and the two antenna elements 200 are all the same, and the longitudinal end portion 301 of one antenna element is substantially at the center of the other antenna element. It may be arranged substantially vertically so as to be located in the vicinity of the split part 109 which is a part. Thereby, in addition to the coupling between the two polarized waves of the antenna element 100 or 200, the influence between the adjacent antenna element 100 and the antenna element 200 can be suppressed.
  • the arrangement of the two antenna elements 100 or the two antenna elements 200 in the vertical relationship is not necessarily the arrangement shown in FIGS. 36, 37, and 38.
  • FIGS. 40, 41, and 42 may be used.
  • 40 is a perspective view of an arrangement modification of the antenna 30
  • FIG. 41 is a side view
  • FIG. 42 is a top view.
  • two antenna elements 100 and two antenna elements 200 that are in a vertical relationship are divided into a split portion 109 in which the longitudinal directions of the antenna elements 100 and 200 correspond to a substantially central portion of the antenna element in the projection onto the conductor reflector 101. Intersect nearby. 40 and 41, the two antenna elements 100 and the two antenna elements 200 are arranged above the conductor reflector 101 (in the positive z-axis direction in the figure) with a gap in the z-axis direction.
  • both ends in the longitudinal direction of the element having a strong electric field strength that are electrically open at the time of resonance are separated from each other, and the magnetic fields created by the two elements are highly orthogonal.
  • the two antenna elements 100 and the two antenna elements 200 which are in a vertical relationship can be arranged close to each other while suppressing the coupling between the two antenna elements 200.
  • the two antenna elements 100 and the two antenna elements 200 may include the conductor feeding portion 123 described in the second embodiment. Further, at that time, as shown in FIG. 43, the position of the conductor feeding portion 123 may be shifted between the two antenna elements 100 and the two antenna elements 200 that are in a vertical relationship. That is, the position where the conductor feeding portion 123 of the antenna element on the upper side is connected to the C-shaped conductor 104 is shifted from the center of the C-shaped conductor 104 so that it does not overlap with the element on the lower side (z-axis negative direction in the figure). It may be.
  • FIG. 44 is a top view of an example of the antenna 40.
  • the antenna 40 includes a plurality of antenna elements 100 and antenna elements 200 each arranged in an array.
  • the antenna elements 100 and 200 are arranged in an X shape.
  • the antenna elements 100 and 200 are two-polarized in the arrangement described with reference to FIGS. 40, 41 and 42 in the third embodiment by two elements having a vertical relationship, respectively.
  • each is arranged in a substantially square array at a distance Distance 1 and a distance Distance 2 in the projection view onto the conductor reflector 101.
  • the distance Distance1 and the distance Distance2 are, for example, approximately 1 ⁇ 2 of ⁇ 1 and approximately 1 ⁇ 2 of approximately ⁇ 2.
  • Distance 1 is approximately equal to twice Distance 2.
  • they are arranged at the same pitch in the x and y directions.
  • the antenna 40 includes a plurality of antenna elements 100 and antenna elements 200, each arranged in an array, so that a plurality of array antennas corresponding to each frequency are configured on the same plane by sharing the conductor reflector 101. be able to.
  • the antenna elements 100 and 200 are each polarized in the antenna elements 100 and 200 in the arrangement described in the third embodiment, and are arrayed for each polarization of each frequency. Has an antenna. Therefore, the antenna 40 can be configured as a multi-band and dual-polarized array antenna on the same plane, and a multi-band and dual-polarized beam forming operation is possible. Similarly to the first embodiment, if a wireless communication device is configured using the antenna 40, a wireless communication device capable of beamforming corresponding to multiband and two polarizations can be provided.
  • the distance between the antenna elements of the array antenna is preferably about half of the wavelength of the electromagnetic wave of the operating frequency in the square array.
  • the distance between the antenna elements 100 and 200 is not necessarily limited to 1/2 of ⁇ 1 or 1/2 of ⁇ 2, and Distance 1 does not necessarily have to be equal to twice Distance 2.
  • the antenna elements 100 and 200 may each constitute an array antenna with only one polarization depending on the application. In FIG. 44, the antenna elements 100 and 200 are each arranged in a square array shape, but the array antenna may be configured by other arrangement methods such as a rectangular arrangement and a triangular arrangement. Alternatively, an array antenna having one side that is shorter than the other side, such as a one-row array or a two-row array, and an overall configuration that is elongated.
  • the antenna elements 100 and 200 described in the first, second, and third embodiments are also appropriately applied to the antenna elements 100 and 200 of the present embodiment.
  • the antenna elements 100 and 200 may include the conductor feeding portion 123 described in the second embodiment.
  • the antenna element 100 and the antenna element 200 are arranged so as not to overlap in the projection view onto the conductor reflector 101, but depending on the relationship between ⁇ 1 and ⁇ 2, the conductor reflector is shown in FIG. In the projection view on 101, they may overlap.
  • the distance between the antenna elements 100 and 200, here, the antenna element 200 in the y - axis direction of the antenna element 200 in the drawing may be changed. That is, in the projection view onto the conductor reflector 101, the antenna element 200 may be inserted in the gap between the antenna elements 100 so that the antenna elements 100 and 200 do not overlap.
  • the combination of the dual polarization method and orientation of the antenna elements 100 and 200 described in the third embodiment and the array arrangement direction of the antenna 40 does not necessarily have to be as shown in FIG.
  • the antenna elements 100 and 200 are dual-polarized in the cross-like arrangement described in FIGS. 40, 41 and 42, and the arrangement direction of the array and the direction of the cross are the same. But you can.
  • the antenna elements 100 and 200 are two-polarized in the T-shaped arrangement described in FIGS. 35, 36 and 37, and the arrangement direction of the array and the direction of the T-shape are the same. Any arrangement may be used. Further, as shown in FIGS. 49 and 50, the antenna elements 100 and 200 are dual-polarized in the T-shaped arrangement described in FIGS. 35, 36 and 37, and the T-shaped direction is approximately 45 from the arrangement direction of the array. An oblique T-shaped arrangement that is inclined may be used.
  • the antenna element 100 is positioned so that the substantially central portion of the element coincides with each lattice point of the square lattice Lattice 1 parallel to the conductor reflector 101, and the antenna element on the adjacent vertex All of them may be arranged so that their longitudinal directions are perpendicular to each other.
  • the antenna elements 100 on adjacent lattice points are in a substantially vertical relationship, and the longitudinal direction of one antenna element 100 faces the center of the longitudinal direction of the other antenna element 100.
  • the antenna element 100 can suppress electromagnetic coupling with the four surrounding antenna elements in a vertical relationship due to the effects described in the second embodiment.
  • the antenna element 200 can be arranged in the same manner, and in addition, the antenna elements 100 and 200 can be arranged so as not to overlap in the projection view onto the conductor reflector 101 as shown in FIG. it can.
  • the square grating Lattice 1 does not necessarily have to be a square, and even if it is a rectangular grating, coupling between four different polarized waves around the antenna element can be suppressed.
  • each element is The direction similar to the above can be taken, and the above-mentioned effect can be acquired at that time.
  • not all the antenna elements may have the above-described orientation and arrangement, and some of the antenna elements may satisfy the performance required for the antenna 40 even if they are not in the above-described orientation and arrangement. Good.
  • the antenna elements 100 and 200 can be arranged in a square array having an inter-element distance of Distance 1 and Distance 2 for each polarization while maintaining the arrangement relationship of FIG. At this time, the distance L lattice 1 between lattice points of Lattice 1 is (1/2) ⁇ 2 ⁇ Distance 1, and the antenna elements 200 are similarly arranged after changing the scale.
  • the antenna 40 may be configured as a dual-polarization array antenna on the same plane by three or more types of antenna elements corresponding to not only two frequencies but also three or more frequency bands.
  • antenna elements 300 having resonance frequencies in a third frequency band that is higher than the second frequency band may be arranged in a square array.
  • the antenna element 300 has the same configuration as that of the antenna elements 100 and 200, is two-polarized like the antenna elements 100 and 200, and is disposed with an inter-element distance Distance 3.
  • the size of the antenna element 300 in the longitudinal direction is about 1 ⁇ 4 of ⁇ 3. In FIG. 53, the distance 3 is about ⁇ 3 / 2.
  • ⁇ 3 indicates a wavelength when an electromagnetic wave having a frequency that is the resonance frequency of the third antenna element travels in a substance that fills the region.
  • the antenna elements 100, 200, and 300 can be arranged so as not to overlap in the projection view onto the conductor reflector 101.
  • a dual-polarization array antenna for three frequencies may be configured in the same arrangement as in FIG.
  • the dual-polarization-compatible multiband antenna array in the antenna 40 described above is configured by arranging a plurality of antenna elements 200 and 300 having different resonance frequencies in the same configuration as the antenna elements 100 and 100 in an array.
  • the antenna element 100 is as small as 1 ⁇ 4 of ⁇ 1 while maintaining the radiation efficiency. Due to its small size, it is possible to increase the gap between the elements of the array antenna at one frequency and suppress the interaction between antenna elements corresponding to different frequencies.
  • a wireless communication apparatus that can perform beam forming corresponding to multi-band and two-polarized waves and suppress interaction between antenna elements having different frequencies by configuring a wireless communication apparatus using the antenna 40. Can do.
  • the existing dipole antenna and patch antenna can be downsized by using meandering or using a high dielectric constant material. Meaning can be applied mainly to dipole antennas and patch antennas, and the use of high dielectric constant materials can be applied mainly to patch antennas. Therefore, even with existing antenna elements that have been reduced in size by such a technique, the above arrangement increases the gap between elements of the array antenna at one frequency and suppresses the interaction between antenna elements corresponding to different frequencies.
  • a dual-polarization multiband antenna array can be configured.
  • FIGS. 44 and 52 a dual-polarization-compatible multiband antenna array using patch antennas corresponding to the arrangements of FIGS. 44 and 52 is shown in FIGS.
  • the patch antennas 400 and 500 have resonance frequencies in the first frequency band and the second frequency band, are miniaturized by the high dielectric constant material Patchdiele, and have two excitation points in the square patch. Two polarizations have been made.
  • the patch antennas 600 and 700 have resonance frequencies in the first frequency band and the second frequency band, respectively, similarly to 400 and 500, are miniaturized by the high dielectric constant material Patchdiele, and described in the third embodiment. Dual polarization has been achieved with the same arrangement as described above.
  • As the high dielectric constant material Patchdiele a ceramic substrate such as an alumina substrate or an aluminum nitride substrate is used.
  • Patent Document 1 International Publication No. 2014/059946
  • Patent Document 1 International Publication No. 2014/059946
  • This publication does not describe anything about the interval between antenna elements and the direction of adjacent antenna elements described in the present embodiment.
  • FIGS. 2a, 2b, 2c are used for separation between individual antenna elements (radiation element module 1) of a single frequency antenna array.
  • An element decoupling structural element 17
  • this separation element is not used as an antenna, and the array of Patent Document 2 is not multiband.
  • Fig. 57 shows a typical sectional view of a patch antenna.
  • the patch antennas 400, 500, 600, and 700 include a GND conductor plate Patchgnd, a dielectric plate Patchdie, a patch conductor Patch, a conductor via Patchvia, and a feeding point 107.
  • the dielectric plate Patchdie is connected to the GND conductor plate Patchgnd.
  • the patch conductor Patch is connected to the surface of the dielectric plate Patchdie opposite to the GND conductor plate Patchgnd.
  • the conductor via Patchvia passes through the dielectric plate Patchdie, one end is electrically connected to the patch conductor Patch, and the other end passes through the clearance portion Patchclear formed in the GND conductor plate Patchgnd, and the dielectric plate patchdiel of the GND conductor plate Patchgnd. To the opposite side.
  • the feeding point 107 electrically excites between the conductor via Patchvia and the GND conductor plate Patchgnd.
  • An electromagnetic wave having a frequency different from the electromagnetic resonance frequency of the first antenna element provided on the conductor reflector and the first antenna provided on the conductor reflector with the first reflector element is electromagnetically
  • a multi-band antenna comprising: a conductor feed line that constitutes an electrical path for feeding power to the letter-shaped conductor.
  • the first and second antenna elements are A conductor feeding part constituting another electric circuit for feeding to the C-shaped conductor;
  • the multiband antenna according to claim 1, wherein the conductor feeding portion has one end connected to an outer edge portion of the C-shaped conductor, the other end connected to the conductor reflector, and arranged side by side with the conductor feeding line.
  • the first and second antenna elements are The multiband antenna according to claim 2, wherein one end of the conductor feeding portion is connected to a portion of the outer edge portion of the C-shaped conductor that faces the split portion.
  • the first and second antenna elements are further The supplementary conductor according to any one of appendices 1 to 3, further comprising at least one auxiliary conductor that is electrically connected to one part of the two parts of the C-shaped conductor facing each other through the split part and is opposed to the other part.
  • the first and second antenna elements are further Any one of Supplementary notes 1 to 4, further comprising at least one conductor radiating portion electrically connected to an outer edge of the end of the C-shaped conductor in a direction in which both portions of the C-shaped conductor facing each other through the split portion face each other.
  • the multiband antenna according to item. Appendix 6)
  • Each of the first antenna and the second antenna includes two of the first and second antenna elements, The multiband antenna according to any one of appendices 1 to 5, wherein the two first and second antenna elements are in a substantially vertical relationship with each other in a projection view onto the conductor reflector.
  • Appendix 20 Appendices 6 to 19 in which the first antenna element included in the first antenna and the second antenna element included in the second antenna are substantially perpendicular to each other in a projection view on the conductor reflector.
  • the multiband antenna according to any one of the above.
  • Appendix 21 Any one of Supplementary Notes 6 to 20, wherein the plurality of first and second antenna elements included in the first and second antennas intersect each other in the vicinity of the split portion in a projection view onto the conductor reflector.
  • the multiband antenna according to one item.
  • (Appendix 21-4) The multiband according to appendix 21-2, wherein a conductor feeding portion is provided on a C-shaped conductor that does not remove the conductor that sandwiches the C-shaped conductor from which the conductor that faces the split portion across the gap is removed antenna.
  • (Appendix 22) A multiband antenna array comprising a plurality of first antennas and second antennas according to any one of supplementary notes 1 to 21 and supplementary notes (21-1) to (21-4).
  • (Appendix 23) A plurality of the first antennas in a lattice shape along a plane substantially parallel to the conductor reflector at a substantially equal interval of approximately half the wavelength of the electromagnetic wave of the resonance frequency of the first antenna element provided in the first antenna.
  • the second antenna is arranged along a plane substantially parallel to the conductor reflector at a substantially equal interval of approximately half the wavelength of the electromagnetic wave of the resonance frequency of the second antenna element of the second antenna.
  • the plurality of first antenna elements provided in the plurality of first antennas are arranged so as to be aligned with an interval in both the vertical direction and the horizontal direction in a projection view on a plane parallel to the conductor reflector.
  • the adjacent first antenna elements are in a substantially vertical relationship, and one of the longitudinal directions faces the vicinity of the center of the other longitudinal direction
  • the plurality of second antenna elements included in the plurality of second antennas are arranged so as to be aligned at intervals in both the vertical direction and the horizontal direction in a projection view on a plane parallel to the conductor reflector.
  • Appendix 25 The multiband antenna array according to any one of appendices 22 to 24, wherein the lattice is a square or a rectangle.
  • Appendix 29 The multiband antenna array according to any one of appendices 22 to 28, wherein the dipole antenna or patch antenna is meandered or uses a high dielectric constant material.
  • Appendix 30 A wireless communication apparatus equipped with the multiband antenna according to any one of appendices 1 to 21 or the multiband antenna array according to any one of appendices 22 to 29.

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Abstract

L'objet de la présente invention est de produire une antenne multibande, un réseau d'antennes multibandes, et un dispositif sans fil, la détérioration de l'efficacité de rayonnement pouvant être supprimée et ledit réseau pouvant être rendu plus compact. Cette antenne comporte : a) une plaque de réflexion en conducteur ; une première antenne comprenant un premier élément d'antenne et disposée sur la plaque de réflexion en conducteur ; et une seconde antenne disposée sur la plaque de réflexion en conducteur, comprenant un second élément d'antenne dont la fréquence de résonance électromagnétique est une fréquence différente de la fréquence de résonance électromagnétique du premier élément d'antenne disposé dans la première antenne. Les premier et second éléments d'antennes comprennent : un conducteur en forme de C qui est sensiblement un conducteur en forme de C dans lequel est formée une section fendue de sorte qu'une partie d'un conducteur annulaire est discontinue ; et une ligne d'alimentation de conducteur électriquement connectée à une section parmi les deux sections du conducteur en forme de C qui se font face de part et d'autre de la section fendue, ladite ligne d'alimentation de conducteur constituant un circuit électrique d'alimentation en puissance du conducteur en forme de C.
PCT/JP2016/000694 2015-02-16 2016-02-10 Antenne multibande, réseau d'antennes multibandes, et dispositif de communications sans fil WO2016132712A1 (fr)

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US15/544,699 US10340609B2 (en) 2015-02-16 2016-02-10 Multiband antenna, multiband antenna array, and wireless communications device

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Cited By (9)

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